schellenger



June 24, 1930. N. c. SCHELLENGER 1,768,297

TUBE MOUNTING Filed Jan. 18, 1926 2 Sheets-Sheet 1 ILL, d

l n 72216/12271 41/ n/ ,f

/fz 6,55% /Vezz/'w C Schelm/@er -.lume 24, 1930. N. c. scHl-:LLENGER TUBE MOUNTING Filed Jan. 18, 1926 2 Sheets-Sheet 2 2/ l@ 0 n 2a Mll,

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#MaJ/m@ /mm f JMfN-L ma. I 6g um@ stud Patented June 2'4, 1930.

UNITED -sTATl-:s PATEN NEWTON c. SCHELLENGER, oF

PHONE SUPPLY coMPANY, WARE T fol-FICE TUBE MOUNTING Appntmn med January 18.1926. serial- No. 81,882.

The present invention relates to mountings for radio or thermionic tubes.

Manufacturers of radio tubes are now putting on the market tubes with longer contact studs and without any guide pins. This makes it possible to provide simple means for guiding the tube and more effective contact .means for making contact with the studs. Y

I"provide a novel form of tube mounting which is particularlyv adapted vfor the new types of tubes. In my mounting suitable openings are provided through which the studs ofthe tubolare adapted to extend. Ad-

jacent` each'of these openings and onthel under side of the mounting is a novel form of contact spring, which serves -to contact with the studs which project through the openings. Each spring is adapted to bear against its co-operating stud insuch a manner as to insure positive line contact on two sides of the studs. For this purpose'Iemploy a generally U-shaped spring, each leg of which is so formed that it exerts an even pressure along all points of contact against the studs. Furthermore, in my type of spring a wiping action is had between the andthe spring along all points of contact ing. The result is that the contact surface is first cleaned of all dust and any oxide which maybe formed thereon before final contactl therewith .is had. This automatic cleaning action is also insured by the twisting action of the spring when the stud is brought to bear upon it.

Also, by employing a generally U-shaped spring,^I am able to obtain a greater length of spring in less space than is usually reuired in tube mounti employing the q ugs f 5 5 of Fig. 4 before.-the stud of a tube has ordinary lfiat type of spring. This feature is especially deslrable for tube mountings or sockets which are to be used in radio receiversj'where it is oftentimes necessary to limit the amount of space required for the tube mounting.

Although my spring is generally U-shaped, the legs thereof do not extend upward vertically as in a U; but out ina diagonal d1- rection. This exposes the base portion of lart with the manner of when the tube is inserted into the mountthe U so that free accessmay be hadthereto for the purpose of fastening the spring to its mounting. l

v Also, the full length of each spring is effectively used in exerting pressure against stud which co-operates with it. Thls is accomplished by so shaping the legs that each portion thereof will tend to twist about its central longitudinal axis when the contact portions are forced into engagement with the tube stud. In the ordinary type of springs now in use, there is only abendlng action and not a combined bending and twisting action-as in my spring. The twisting actlon is further brought about by making' the legs convergent at -their free ends.

Hence the tube stud in forcing the legs apart will cause a greater bending and twlsting action with the result contact is obtained. Still another feature of my invention isl lts relative simplicity. The springs which are employed are made of Ametal stamping; and as such are comparatively cheap and easy to manufacture.

Inr order to acquaint those skilled in the `constructing my invention, I shall now describe an embodiment of the same 'in connection with the accompanying drawings.

In the drawings Figure 1 is a front elevational view of one that firmer and better form of my invention, showing a tube mounted thereon;

Fig. 2 is a top plan View of the same; Fig. 3 is a bottom view of the form shown in Fig, l;

. Fig. 4 is an enlarged sectional, view taken on line 4-4 of Fig. 2;

Fig. 5 is la sectional view taken on line engaged `with its co-operating spring;

Fig. `6 is also a view taken on line 5 5 of Fig. 4 after the stud is brought into engagement with its co-operating spring;

Fig. 7 is a topv plan view of another embodiment of my invention;

Fig. 8 is a bottom view of same;

Fig. 9 is an enlarged sectional view taken on line 9-:9 of Fig. 7;

Fig. 10 is an iso spring of my invent Fig. l1 is an ison the legs of asimp in solid lines, in dotted lines; and 12 is an isometric modification of my Similar numerals` re veral views.A

mprises a base portheir free ends both of the legs, both'of l 12 vwhich isprowhich are designated in Fig. 10 by the nu- 13 and also a meral 25, are provided with an upwardly larger diamextending lug portion 26. These .lugs are 3. These openings slightly bent to one side to permit the tube the base 12 and are studs to readily engage with them.

e 15. In" Fig. 5 I have illustrated a tube stud 27 spring spring throughout the se The tube mounting co tion of insulating materia vided with a pair of pair of openings 14 eter than the openings 1 extend vertically through adapted to receive The tube studs are. pair which is adapt openings 1 pair which is to e 'ings 13. By this arran not possibly get the stu holes and tact springs, ed into its moun .j aligned with their prop -.the upper end of each and 14 is slightly flange on each of through the base The base'lmember openings 16 throng ingscrews may base to a support m means. The underside ofthe vided with a` depres in which are mou f 18 by means of means 19. eral movement of the springs, l able lugs or pins downward from the. bottol member 12. Thes with the base by therefor in the formed, or they may have been placed 1n ormedwth tend upwardly thro locked in place by Each screw may a suitable lugfo and a lock nut ly against the nuts 20.

The gist of my inve novel provision An isometric view o springs 18 is shown in Fig Aout of a single piece of has a generally U-shape. 23 thereof is substantiallyl ed off at its outer end so a cient room for the opening the holding means for the spr contact spring.

lter to similar parts base and are of substantially the same width ds of the tub likewisel paired off. ed to extendl through the base 12. The contact spring with which larger diameter than the the stud is to engage has its lug member 26 85 xtend through the opendirectly below and in line with the opening.` ement the user can Tow, 'as' the stud 27 is forced 'through the through the wrong opening and into engagementwith the coninto Contact with the wrong contact spring 18, it will force apart the leg 25 for the tube can notbe insert# of the spring by giving it aslight twist, and ting unless the studs Also, be in firm contact 4with both legs of the of the openings 13 spring. This is shown in Figs. 4 and 6. -bored to seat the The action andadvantages of my spring the studs which protrude may be more Jullybrought out 'by compar- 95 tionv `of the tube 15.v ing it with a box shaped spring shown in lso provided with Fig. 11. In this figure the legs of the box h which suitable fastenspring are shown in solid lines and the legs nserted for securing the Aof my spring in dotted lines. Now, when ember or other mounting the tube stud is inserted between the legs of base 12 is prothe box spring, ,it will cause them to move ecess 17 out laterally by a bending action about a ed the contact springs vertical axis which extends through a point suitable screw.- fastening at which the inner edge `of the base and the t any sidewise or latupper edge of the legs meet, asl shown by the 105 I providesuib' lines B-B and B-B. Henceit isobvious tend vertical-ly that by this arrangement only a part ot n side of the base each. leg is brought into action; the back d integral portion, which is integral with the base, bev making suitable openings ing held rigidly in place. However, if a 110 die in which the base is portion of each leg is cut away so that it be -separate pins which takes'the form shown by the ldotted lines, the forming die and the result will be quite diierent. Now, The screws 19 exwhen the stud is forced between the legs, a ugh the base 12 and are combined bending and'twisting action will 115 means of the nuts'20. take place. rIfhe bending willagain be about lso be provided with a the -axis B-B, but the twisting or turning" dering leads 21 thereto will take place about the central longitucli'-l 22 for securing the, lugrmvnal axis AA.' The twisting or turning is' er openings.

sed portion or r 32 which ex e may be forme of the cont metric view of a contact to extend. The inner edge of the base 23, i

however, is curved inwardly so as to lltout etric'view which shows the corners between the base and .the legs. le formy 'of box 'shaped It will also be noted that the base 23 has a and the legs of my generally triangular shape. A pair of legs 70 extend downwardly in a ,diagonal direcview o another tion from the sides of this base and converge. A'llhese legs are integral with the throughout except at their free ends. At 75 The which is about to enter an opening in the' are when ,the stud 1s in its final position it will now permitted because the portion which 12o ntio-n consists in the would hold the leg v above the axis A-l-A actvsprings 18. from turning has-been removed, andV like-` f one of the contact wise that portion which would prevent the 10.'V It is formed .lower portion of the kleg from turningA has spring metal and also been removed. The result is vthat no The base portion resistance is offered to the legs either at fiat and is roundtheir upper Aor lower sides, thereby making s tofurnish suiiitheir full lengths effective for contact with L 24 through which a cooperating stud. ing is adapted I nd that when the stud is'brought into 130 engagement with the contact spring'that it tends to twist both legs of the spring out laterally. This seems to help materially in permitting the legs 25 to exert an even pressure against the tube stud. The result is that firm line contact is had on two sides ofthe' stud for substantially the entire width of the leg members 25.

I may also employ my novel springs in various other ways. For example, I may mount Vthem in the manner illustrated in Figs. 7 8 and 9, in which a plate member 30 is employed. This member is adapted to serve as a mount-ing plate for a plurality of tubes and may be made of insulating material or may even be made of metal by properly insulatin the various stud and screw openings. therwise, the essential novelty disclosed as to the embodiment shown in Fig. l is equally applicable to that shown in Figs. 7, 8 and 9.

In Fig. 12, I illustrate another form of contact spring. This spring comprises a generally triangular base portion 35, having an opening 36 for mounting purposes and a lug 37 integral therewith for making contact therewith. The lug 37 is adapted to extend through a suitable opening in the base` on which the spring is mounted. The spring may be secured to its mounting base by means of a suitable rivet or screw which extends through the opening 36 therein. Projecting downwardl from each side of the base are a pair o generally U-shaped legs 38. These legs also converge at their free ends for making rmer contact with the stud which is adapted to cooperate with them.

It is also obvious that I may provide means on the base portion by which the spring may be secured to the mounting base without the useof the screw members and nuts shown. I may also provide a lug integral with the base 23 in the form shown in Fig. 10 which might extend upwardly or out laterally through the mounting base. Such a lug would serve a two-fold purpose. It would serve to hold the spring in place, and it would also serve as a means for making contact to the spring. Also, I may provide suitable seats or grooves for the base portion of the springs in the mounting member for preventing any possible lat- -eral movement of the sprlngs. However, I-

find that this is not necessary if the springs are firmly secured to the mounting member by the manufacturer.

I do not wish to be limited to the details shown or described.

I claim 1. A contact spring comprising a base portion and a pair of legs extending diagonally downward from said base portion.

' 2. A contact spring comprising a base portion and a pair of coverging legs projecting diagonally and downwardly from said base portion, said 'legs having a pair of upwardy extending lugs.

3. n combination, a mounting member having an opening for receiving a tube stud, a generally U-shaped spring member having a base-portion and a pair of legs extending diagonally therefrom, and bolt means extending through said base portion for securing said spring to said mounting member.

4. In combination, a mounting member having a plurality of openings adapted to receive the studs of a thermionic tube, a plurality of spring members, each of said spring members comprising a base portion having an opening, and n pair of converging legs extending diagonally from the longitudinal sides of said base, the free ends of stud and comprising a base portion, a pair of converging legs extending diagonally downward `from said base, the free ends of said legs being below and in substantial alignment with the opening in said mounting member and a pair of laterally extending ears formed integral with said free ends `and being adapted to be initially engaged by the stud to flex the legs of said spring means, said diagonal slant of said legs permitting the free ends thereof to Hex about both a vertical and a horizontal axis.

6. A contact spring comprising a base portion 'and a pair of legs depending therefrom at an acute angle in planes disposed at right angles to the plane of the base portion, the legsextending convergently outward beyond the base portion to permit the insertion of a stud therebetween, lugs on the outer ends of said legs disposed in the planes of the legs and having tips disposed at an angle thereto, the convergently extended portionsof the legs being capable of spreading on reception of the stud contacting between the lugs, and being capable of warping to accommodate the lugs to the surfaces of the stud.

In witness whereof, I hereunto subscribe my name this 8th day of January, 1926.

NEWTON C. SCHELLEN GER. 

